129255552 has 192 divisors, whose sum is σ = 397402200. Its totient is φ = 40255488.

The previous prime is 129255521. The next prime is 129255569. The reversal of 129255552 is 255552921.

129255552 is a `hidden beast` number, since 12 + 92 + 5 + 5 + 552 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 122412096 + 6843456 = 11064^2 + 2616^2 .

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1770588 + ... + 1770660.

Almost surely, 2^129255552 is an apocalyptic number.

129255552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129255552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198701100).

129255552 is an abundant number, since it is smaller than the sum of its proper divisors (268146648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129255552 is a wasteful number, since it uses less digits than its factorization.

129255552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 160 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 129255552 is about 11369.0611749608. The cubic root of 129255552 is about 505.6108700862.

The spelling of 129255552 in words is "one hundred twenty-nine million, two hundred fifty-five thousand, five hundred fifty-two".